When nad + reacts with hydrogen and gains two electrons, nad + is

NAD+ is an electron carrier molecule that helps pass energy from glucose to other pathways in a cell by taking high-energy electrons and holding on to them until they can be transferred to other molecules.

NAD+ is reduced. It becomes NADH.

NAD+ is an electron carrier molecule that helps pass energy from glucose to other pathways in a cell by taking high-energy electrons and holding on to them until they can be transferred to other molecules.

explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.